| /* |
| * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef WEBRTC_MEDIA_BASE_VIDEOSOURCEINTERFACE_H_ |
| #define WEBRTC_MEDIA_BASE_VIDEOSOURCEINTERFACE_H_ |
| |
| #include "webrtc/api/optional.h" |
| #include "webrtc/media/base/videosinkinterface.h" |
| |
| namespace rtc { |
| |
| // VideoSinkWants is used for notifying the source of properties a video frame |
| // should have when it is delivered to a certain sink. |
| struct VideoSinkWants { |
| VideoSinkWants(); |
| ~VideoSinkWants(); |
| // Tells the source whether the sink wants frames with rotation applied. |
| // By default, any rotation must be applied by the sink. |
| bool rotation_applied = false; |
| |
| // Tells the source that the sink only wants black frames. |
| bool black_frames = false; |
| |
| // Tells the source the maximum number of pixels the sink wants. |
| int max_pixel_count = std::numeric_limits<int>::max(); |
| // Tells the source the desired number of pixels the sinks wants. This will |
| // typically be used when stepping the resolution up again when conditions |
| // have improved after an earlier downgrade. The source should select the |
| // closest resolution to this pixel count, but if max_pixel_count is set, it |
| // still sets the absolute upper bound. |
| rtc::Optional<int> target_pixel_count; |
| // Tells the source the maximum framerate the sink wants. |
| int max_framerate_fps = std::numeric_limits<int>::max(); |
| }; |
| |
| template <typename VideoFrameT> |
| class VideoSourceInterface { |
| public: |
| virtual void AddOrUpdateSink(VideoSinkInterface<VideoFrameT>* sink, |
| const VideoSinkWants& wants) = 0; |
| // RemoveSink must guarantee that at the time the method returns, |
| // there is no current and no future calls to VideoSinkInterface::OnFrame. |
| virtual void RemoveSink(VideoSinkInterface<VideoFrameT>* sink) = 0; |
| |
| protected: |
| virtual ~VideoSourceInterface() {} |
| }; |
| |
| } // namespace rtc |
| #endif // WEBRTC_MEDIA_BASE_VIDEOSOURCEINTERFACE_H_ |